Fix stack too deep by reverting changes

contracts/pfactory/PlainTextProposalFactory.sol

@@ -20,16 +20,32 @@ contract PlainTextProposalFactory is ScopedVerifier {
     /// @param __start The start time
     /// @param __minEnd The minimum end time
     /// @param __maxEnd The maximum end time
-    function create(string calldata __name, string calldata __description, bytes32[] calldata __options,
-        uint256 __minVotes, uint256 __minAgreement, uint256 __start, uint256 __minEnd, uint256 __maxEnd) payable external {
+    function create(
+        string calldata __name,
+        string calldata __description,
+        bytes32[] calldata __options,
+        uint256 __minVotes,
+        uint256 __minAgreement,
+        uint256 __start,
+        uint256 __minEnd,
+        uint256 __maxEnd
+    ) payable external {
         // use memory to avoid stack overflow
         uint256[] memory params = new uint256[](5);
         params[0] = __minVotes;
         params[1] = __minAgreement;
         params[2] = __start;
         params[3] = __minEnd;
         params[4] = __maxEnd;
+        _create(__name, __description, __options, params);
+    }
 
+    /// @dev internal function to create a new PlainTextProposal
+    /// @param __name The name of the proposal
+    /// @param __description The description of the proposal
+    /// @param __options The options of the proposal
+    /// @param params The parameters of the proposal
+    function _create(string memory __name, string memory __description, bytes32[] memory __options, uint256[] memory params) internal {
         PlainTextProposal proposal = new PlainTextProposal(__name, __description, __options,
             params[0], params[1], params[2], params[3], params[4], address(0));
         proposal.transferOwnership(msg.sender);